JP2006010040A - Water sealing pad and method of sealing water at mounting pipe port by using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water sealing pad and a method of sealing water at a mounting pipe port capable of increasing an adhesive force by increasing tightness when the sleeve of the water sealing pad is inserted into the mounting pipe port from a main pipe side or a manhole side and sticking the flange of the water sealing pad on the inner surface of the main pipe or the manhole through a synthetic rubber adhesive agent. <P>SOLUTION: In this water sealing pad, a tubular sleeve having an outline smaller than the inner diameter of a mounting pipe and a flange extended, in a flange shape, from one end edge part of the tubular sleeve are formed integrally with each other. The synthetic rubber based adhesive agent is applied onto the surface of the flange, the shape of the flange is formed in a curved shape forming a part of a cylindrical surface, the curved shape is larger than a shape formed by dividing the cylindrical part into two parts, and the curvature of the cylindrical surface forming the curved shape is formed larger than the inner surface curvature of the main pipe. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water-stop pad suitably used for a mounting pipe port and a water-stopping method for the mounting pipe port when lining an underground pipe line with a resin rehabilitation pipe.

  In general, when a pipeline for sewage buried in the ground is aged, the inner surface of the pipeline is lined with a resin rehabilitation pipe to reinforce the pipeline. In particular, when a mounting pipe is connected to the main pipe or a human hole, the connection part (mounting pipe port) between the two is often aged due to ground fluctuations, and spring water flows from this connection part. There is a risk that soil water such as rainwater will flow into the main and the amount of water in the main will exceed the allowable amount.

In order to solve the above-mentioned problem, in Patent Document 1, the applicant of the present invention has made a thermoplastic resin stopper comprising a cylindrical sleeve and a flange-like flange formed at one end edge of the sleeve. A water pad is used to stop water around the main pipe or the mounting pipe opening opened to the human hole,
With a protective ring made of a synthetic rubber-based independent foam wrapped around the outer peripheral surface of the sleeve of the water-stop pad, this sleeve is inserted into the attachment tube port from the main pipe side or the human hole side, and a synthetic rubber-based adhesive A step of adhering the flange of the water stop pad to the inner surface of the main pipe or the human hole through the agent, and inserting a thermoplastic resin rehabilitation pipe into the mounting pipe, and the closed end of the rehabilitation pipe to the water stop Inserting the pad sleeve into the main or manhole and expanding the diameter of the rehabilitation pipe by heating and pressurizing from the inside, and at the same time, expanding the sleeve of the water-stop pad with the heat and pressure. A step of crimping to the inner peripheral surface of the mounting pipe, and a step of cutting off the distal end portion of the expanded rehabilitation pipe at a position substantially coinciding with the flange of the water stop pad. Water stop method and the same size as the inner diameter of the mounting pipe A cylindrical sleeve having a slightly smaller outer diameter and a flange projecting in a hook shape from one end edge of this sleeve are integrally molded, and a synthetic rubber adhesive is applied to the surface of the flange In addition, there is disclosed a water stop pad, etc., characterized in that a water-swellable water stop member is bonded to the inner peripheral surface of the sleeve.

However, according to the study of the present inventor, when the above-mentioned water-stop pad is used, the sleeve of the water-stop pad is inserted into the attachment pipe port from the main pipe side or the human hole side, and a synthetic rubber adhesive is used. When sticking the flange of the water stop pad to the inner surface of the main pipe or the human hole, there may be a problem that the positioning is not always easy, or there are places where the adhesive strength is weak, and the water stop may not be complete. It was.
JP 2003-336786 A

  The present invention has been made in order to solve the above-mentioned problems. When the underground conduit is lined with a resin-made rehabilitation pipe, the sleeve of the water stop pad is attached from the main pipe side or the manhole side to the mounting pipe port. When attaching the flange of the water stop pad to the inner surface of the main pipe or the human hole via a synthetic rubber adhesive, it is easy to align and improve adhesion and improve adhesion An object of the present invention is to provide a water-stop pad that can be used and a water-stop method for an attachment pipe port using the pad.

  The water-stop pad according to claim 1 is integrally formed with a cylindrical sleeve having an outer shape smaller than the inner diameter of the mounting tube and a flange projecting in a bowl shape from one end edge of the cylindrical sleeve, A synthetic rubber-based adhesive is applied to the surface of the flange, and the shape of the flange is formed into a curved shape forming a part of the cylindrical surface, and the curved shape is larger than the shape obtained by dividing the cylindrical surface in half. The curvature of the cylindrical surface forming the shape is larger than the curvature of the inner surface of the main pipe.

  The water-stopping method for the mounting pipe opening according to claim 2 is a method for stopping water around the main pipe or the mounting pipe opening opened to the human hole using the water-stopping pad according to claim 1. With the flange of the water pad elastically deformed to a size smaller than the inner diameter of the main pipe, the sleeve is inserted into the mounting pipe port from the main pipe side or the human hole side, and the elastic deformation of the flange is released, so that the flange or main pipe or The process of adhering to the inner surface of the human hole and sticking the flange of the water stop pad to the main pipe or the inner surface of the human hole via a synthetic rubber adhesive, and inserting a rehabilitation pipe made of thermoplastic resin into the mounting pipe A step of inserting the closed end portion of the rehabilitation pipe into the sleeve of the water stop pad to reach the inside of the main pipe or the human hole, and heating and pressurizing the rehabilitation pipe from the inside while expanding its diameter. And the inner peripheral surface of the mounting pipe by expanding the sleeve of the water stop pad with pressure A step of crimping, characterized by comprising the steps of resecting the distal end portion of the enlarged the rehabilitating pipe in the flange of the water stop pad substantially matching position.

  As described above, the waterproof pad of the present invention is formed in a curved shape in which the flange shape forms a part of the cylindrical surface, and the curved shape is larger than the shape obtained by dividing the cylindrical surface in half. Adhesive force can be improved, and the curvature of the cylindrical surface forming the curved shape is larger than the curvature of the inner surface of the main pipe, so the elasticity of the cylindrical surface makes it easier for the flange to naturally follow the inner surface of the main pipe. It is possible to provide a waterproof pad that can be easily aligned.

  Since the above-mentioned water stop pad is used for the water stop method for the attachment pipe port of the present invention, it is possible to provide a water stop method for the attachment pipe port that exhibits the same effect as described above.

  FIG. 1 shows an example of a waterproof pad of the present invention. The water stop pad 20 includes a cylindrical sleeve 20a and a flange 20b projecting like a bowl from one end edge of the sleeve 20a. The outer diameter of the sleeve 20a is formed slightly smaller than the inner diameter of the mounting tube 8, and the flange 20b is formed in a curved shape that forms a part of the cylindrical surface along the inner surface of the main tube, and the curved shape is half of the cylindrical surface. The curvature of the cylindrical surface forming the curved shape is larger than the curvature of the inner surface of the main pipe. The thickness of the sleeve 20a and the flange 20b is preferably 1 to 5 mm.

  The sleeve 20a and the flange 20b are integrally formed of a thermoplastic resin. As a thermoplastic resin for forming the waterstop pad 20, for example, a hard vinyl chloride resin composition can be suitably used.

  Butyl rubber or a similar synthetic rubber adhesive 21 is applied to the surface of the flange 20b (outside the cylindrical surface). Further, a hydraulic shock absorbing material 22 formed of chloroprene rubber or a similar synthetic rubber-based independent foam is disposed on the outer peripheral surface of the sleeve 20a on the side close to the flange 20b, and is wound in a band shape. When the inner diameter of the mounting tube is, for example, about 150 mm, the outer diameter of the hydraulic buffer material 22 is about 100 to 140 mm, the thickness is 10 mm, and the width is about 25 mm.

  The water stop pad 20 is carried into the main pipe 2 in a state where the flange 20b is elastically deformed to be smaller than the curvature of the inner surface of the main pipe 2 by, for example, a sticking device 23 as shown in FIG. Aligned and attached to the attachment tube port 3 opened in the main pipe 2. The illustrated sticking device 23 includes a carriage part 23a that can be moved in the main pipe 2 by guidance, and a movable part 23b that is movable up and down relative to the carriage part 23a and swingable in the inner circumferential direction of the main pipe 2. It has. A pressing plate 23c curved in a circular arc shape is attached to the movable portion 23b, and the water stop pad 20 is placed on the upper surface of the pressing plate 23c in a temporarily fixed state. In this state, the sticking device 23 is sent into the main pipe 2, the movable part 23b is operated, and the water stop pad 20 is moved to the attachment pipe port 3 by using a camera or the like attached to the sticking device 23. Combine and stick.

  FIG. 3 shows an enlarged view of the state where the water stop pad 20 is adhered to the attachment tube port 3. In this state, the water stop pad 20 is adhered to the inner surface of the main pipe 2 via the adhesive 21 applied to the flange 20b. However, if the inner surface of the main pipe 2 is wet, the adhesive 21 such as butyl rubber may not provide sufficient adhesive force. In such a case, a modified silicon adhesive or the like is previously applied to the surface of the butyl rubber. It is preferable to apply it.

  In the above, the shape of the flange 20b is formed in a curved shape forming a part of the cylindrical surface, and the curved shape is formed larger than the shape obtained by dividing the cylindrical surface in half (corresponding to the broken line in the figure) Adhesion can be improved and adhesion can be improved. Further, since the curvature of the cylindrical surface forming the curved shape is larger than the curvature of the inner surface of the main pipe 2, the cylindrical surface of the flange 20b is elastically deformed along the curvature of the inner surface of the main pipe 2, so that the flange 20b However, it is easy to naturally follow the inner surface of the main pipe 2 and positioning becomes easy.

  After the water stop pad 20 is set in the attachment tube port 3 in this way, a rehabilitation tube (not shown) is inserted into the attachment tube 8. And after inserting a front-end | tip part into the sleeve 20a of the water stop pad 20 and extending in the main pipe 2, a rehabilitation pipe | tube is heated and pressurized from an inner side and diameter-expanded.

  The state of the attachment pipe port when the diameter of the rehabilitation pipe is enlarged is shown in FIG. The diameter of the sleeve 20a of the water stop pad 20 is simultaneously expanded by the heat of the steam blown into the rehabilitation pipe 1 and the pressure of the air, and the sleeve 20a is sandwiched between the sleeve 20a and the mounting pipe 8. Is shaped along the inner peripheral surface of the mounting tube 8. The sleeve 20a and the rehabilitating pipe 1 are pressure-bonded to each other by heating and pressurization. However, if it is intended to obtain a stronger adhesion, an appropriate adhesive is interposed between the sleeve 20a and the rehabilitating pipe 1. Also good.

  If the water-stopping member and the rehabilitation pipe 1 are shaped along the attachment pipe port 3, the tip of the rehabilitation pipe 1 is cut out by the cutting machine 17 fed into the main pipe 2 as shown in FIG. To do. However, in the water stopping method of the present invention, it is not necessary to turn the rehabilitation pipe 1 over, so that the excision position at this time is a position that substantially coincides with the flange 20b of the water stopping pad 20 (near the position of the broken line in FIG. 4). , It will be a position that protrudes slightly inside the main pipe 2. This completes the water stop work process.

  Thus, according to the configuration of the present embodiment, the positioning of the water stop pad 20 is easy, the adhesiveness is improved, the adhesive force can be improved, and the mounting tube port can be reliably stopped. .

It is a model perspective view which shows an example of the water stop pad which concerns on this invention. It is explanatory drawing which shows the method of attaching the said water stop pad to an attachment pipe port from the main pipe side. It is a fragmentary sectional view which shows the state by which the said water stop pad was set to the attachment pipe port. It is a fragmentary sectional view which shows the state which expanded the diameter of the said water stop pad with the rehabilitation pipe | tube. It is a fragmentary sectional view near the attachment pipe mouth showing the process of cutting the tip part of the expanded rehabilitation pipe with a cutting machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rehabilitation pipe 2 Main pipe 3 Mounting pipe port 8 Mounting pipe 20 Water stop pad 20a Sleeve 20b Flange 21 Adhesive 22 Hydraulic buffer material

Claims (2)

  A cylindrical sleeve having an outer shape smaller than the inner diameter of the mounting tube and a flange projecting in a hook shape from one end edge of the cylindrical sleeve are integrally formed, and a synthetic rubber-based adhesive is formed on the surface of the flange Is applied, and the shape of the flange is formed into a curved shape forming a part of the cylindrical surface, the curved shape is larger than the shape obtained by dividing the cylindrical surface in half, and the curvature of the cylindrical surface forming the curved shape is Water stop pad characterized by being larger than the curvature of the inner surface of the tube. A method for water-stopping a periphery of a main pipe or an attachment pipe opening opened to a human hole using the water-stop pad according to claim 1, wherein the flange of the water-stop pad is elastic to a size smaller than the inner diameter of the main pipe. In a deformed state, the sleeve is inserted into the mounting tube port from the main pipe side or the human hole side, the elastic deformation of the flange is released, the flange is brought into close contact with the inner surface of the main pipe or the human hole, and a synthetic rubber adhesive The process of sticking the flange of the water stop pad to the inner surface of the main pipe or the human hole through the pipe, inserting the rehabilitation pipe made of thermoplastic resin into the mounting pipe, and the closed end of the rehabilitation pipe to the water stop pad The diameter of the water-retaining pad sleeve is expanded by heating and pressurizing the inside of the rehabilitation pipe from the inside, and at the same time the diameter of the sleeve of the water stop pad is increased by the heat and pressure. The process of crimping to the inner peripheral surface of the mounting pipe, and the tip of the expanded rehabilitation pipe Waterproofing method of mounting tube opening, characterized by comprising the steps of excising part substantially matching the position on the flange of the water stop pad, a.

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